Method and device for correcting the output signal from a digita

Details Method and device for correcting the output signal from a digita Method and device for correcting the output signal from a digita

1974-11-11

1976-09-07

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

System

235 92FL, G01F 105

Patent

active

039787273

ABSTRACT:
A method and circuit is provided for correcting an output signal pulse train received from a digital transducer representing a physical magnitude. The pulse frequency varies proportionally, although not directly proportionally, with said magnitude so that in a graph the relationship will be illustrated by a straight line which will not intersect the origin of the graph but pass on either side thereof. By superimposing (adding or subtracting) correction pulses on the transducer pulses, said line is displaced and caused to intersect the origin. In superimposition, primarily two conditions have to be fulfilled: no correction pulses are sent for superimposition unless a transducer pulse has occurred first, and the correction pulses and transducer pulses are maintained separated in time so as to be clearly distinguishable.

REFERENCES:
patent: 3302005 (1967-01-01), Farnsworth
patent: 3605497 (1971-09-01), Zimmerman et al.
patent: 3660644 (1972-05-01), Hammond et al.
patent: 3705295 (1972-12-01), Betz
patent: 3864551 (1975-02-01), Oefinger

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